EP0930155A1 - Verbundwerkstoff aus metallfolie und papier - Google Patents

Verbundwerkstoff aus metallfolie und papier Download PDF

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Publication number
EP0930155A1
EP0930155A1 EP98921765A EP98921765A EP0930155A1 EP 0930155 A1 EP0930155 A1 EP 0930155A1 EP 98921765 A EP98921765 A EP 98921765A EP 98921765 A EP98921765 A EP 98921765A EP 0930155 A1 EP0930155 A1 EP 0930155A1
Authority
EP
European Patent Office
Prior art keywords
paper
layer
metal sheet
printing ink
laminated metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98921765A
Other languages
English (en)
French (fr)
Other versions
EP0930155A4 (de
Inventor
Tadashige Kakogawa Works in NAKAMOTO
Hideki Kakogawa Works NAKAMURA
Takeshi Mitsui Bussan Construction Materials KII
Noboru Mitsui & Co. Ltd. KISHIDA
Koji Dantani Corporation ISHIMOTO
Mitsuo Tokyo Color Gravure Industrial Co. IKEDA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Dantani Corp
Tokyo Color Gravure Industrial Co Ltd
Dantani Plywood Co Ltd
Kobe Steel Ltd
Mitsui and Co Ltd
Mitsui Bussan Construction Materials Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP06375198A external-priority patent/JP3273756B2/ja
Application filed by Dantani Corp, Tokyo Color Gravure Industrial Co Ltd, Dantani Plywood Co Ltd, Kobe Steel Ltd, Mitsui and Co Ltd, Mitsui Bussan Construction Materials Co Ltd filed Critical Dantani Corp
Publication of EP0930155A1 publication Critical patent/EP0930155A1/de
Publication of EP0930155A4 publication Critical patent/EP0930155A4/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/12—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/06—Veined printings; Fluorescent printings; Stereoscopic images; Imitated patterns, e.g. tissues, textiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24066—Wood grain
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24438—Artificial wood or leather grain surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24496—Foamed or cellular component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24521—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • Y10T428/2462—Composite web or sheet with partial filling of valleys on outer surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24736—Ornamental design or indicia
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24851—Intermediate layer is discontinuous or differential
    • Y10T428/24868—Translucent outer layer
    • Y10T428/24876—Intermediate layer contains particulate material [e.g., pigment, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31703—Next to cellulosic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • the present invention relates to a paper-laminated metal sheet including a metal base material and paper laminated on the metal base material.
  • the present invention relates to a paper-laminated metal sheet with high aesthetic appearance which has various applications including construction materials for houses and buildings such as inner wall materials, floor materials, ceiling materials, interior materials, panels, and doors, casing members for furniture such as lockers, cabinets, and counters, casing members for electric appliances, interior materials for vehicles such as cars, trains, and ships, and vessels and metal fixtures.
  • a resin coating is applied to the surface of a plated or non-plated metal base material. After that, beautiful colors, designs or patterns may be printed thereon. As a result, a beautifully coated metal sheet is obtained.
  • a metal base material is subjected to hot rolling, and a black oxide layer naturally formed during the hot rolling is utilized to make designs thereon.
  • a steel sheet or a titanium alloy sheet formed with decorative coatings in various colors In this method, an oxide layer of navy blue or other colors is artificially formed onto the surface of the metal base material.
  • the metal sheets obtained in these conventional methods have beautiful and aesthetic appearance formed; however, a coolness and touch feel inheriting from metal sheets remain.
  • film-laminated metal sheets are also known.
  • the film-laminated metal sheets are formed by laminating a film of polyvinyl chloride, polyolefin, or an acrylic resin onto a metal base material.
  • the laminated films are effective in giving high corrosion resistance and scratching resistance to the metal sheets; however, few of them have aesthetic appearance property.
  • these laminated films are thermoplastic in applications where the processability is important, and therefore, they have low heat resistance.
  • polyvinyl chloride films have been widely used; however, they generate harmful gas when burned, causing an air-pollution problem.
  • Japanese Unexamined Patent Publication No. 7-256822 discloses a paper-laminated metal sheet including a metal base material and paper laminated on the metal base material via an adhesive agent.
  • the features of this invention seem to reside in that, when the paper-laminated metal sheet is subjected to a bending process, the portion to be bent is wet with water and then is bent, thereby preventing the paper from being torn.
  • the step of wetting the portion to be bent of the paper-laminated metal sheets one by one makes the production process complicated, and lowers the productivity.
  • the wet paper-laminated metal sheet can be easily bent, the strength of its paper is lowered. As a result, a problem arises in that the paper is damaged or torn during the processing. There is also a problem that, in the state of being wet with water, the paper loses its adhesiveness to the metal base material. Depending on the processings, the paper may peel off from the metal base material.
  • the present invention has been achieved in view of the above-described situation, and an objective thereof is to provide a paper-laminated metal sheet which can be processed without wetting with water, while preventing the paper from being torn with, and which keeps the aesthetic appearance derived from the paper for a long period of time.
  • Another objective of the present invention is to provide a paper-laminated metal sheet with high strength and processability derived from the metal base material, as well as unbelievably high aesthetic appearance for a metal plate derived from paper, whereby the paper-laminated metal sheet is valuable as a novel material having various applications.
  • a paper-laminated metal sheet has a structure in which at least a sheet of paper is laminated on at least one side of a metal base material via a pressure sensitive adhesive agent or an adhesive agent layer, and a protective layer is formed on the top surface of the paper-laminated side.
  • the paper-laminated metal sheet has a soft and warm touch derived from the paper while eliminating an inorganic appearance and a cold touch inherent to metals.
  • the protective layer prevents the paper from being damaged during the time when the paper-laminated metal sheet is processed or is used for products.
  • higher aesthetic appearance is attained. For example, when paper printed with a woodgrain pattern is used, the metal plate is valuable in various applications as a novel material with high quality appearance.
  • a paper-laminated metal sheet of the present invention has a structure in which at least a sheet of paper is laminated on at least one side of a metal base material via a pressure sensitive adhesive agent or an adhesive agent layer, and a protective layer is formed on the top surface of the paper-laminated side.
  • the protective layer preferably is a water-repellent resin film, and specifically, a water-repellent resin film having a water contact angle of 60 degree or more measured by a liquid drop method at 23°C.
  • the protective layer with water repellency prevents the paper from being torn, and also avoids water penetration through the paper to protect the metal base material from corrosion by water.
  • the peel strength at 180 degree between the metal base material and the paper laminated on the metal base material preferably is in the range between 0.01 to 5.0kgf/10mm in width, and the peel strength preferably is smaller than the breaking strength of the paper itself.
  • the paper-laminated metal sheet, which satisfies these preferable requirements has high processability. Therefore, the paper-laminated metal sheet eliminates the step of wetting paper which makes the processing complicated and makes the protection of the paper from damage difficult.
  • the paper preferably is decorative paper having depressions and/or protrusions on its surface, and the depressions and/or the protrusions have colors different from the surrounding portions to form a visually recognizable design.
  • decorative paper having a structure in which at least a printing ink layer and a resin layer is formed on a paper base material, and the depressions and/or the protrusions are formed on the surface of the resin layer.
  • the paper-laminated metal sheet is valuable in various applications as a novel material with high quality appearance.
  • the resin layer of the decorative paper has depressions to be dark-colored portions of the woodgrain pattern.
  • the woodgrain pattern of the decorative paper resembles to a natural wood in appearance.
  • the decorative paper preferably has the following structure. On the entire surface of a base paper material, a first printing ink layer to be light-colored portions of the woodgrain pattern is formed directly or via another layer. Next, a second printing ink layer to be dark-colored portions of the woodgrain pattern is formed, and then, a resin layer containing a curing agent is formed on the first and second printing ink layers.
  • the second printing ink layer is formed using ink including a compound which reacts with the curing agent of the resin layer to generate gas.
  • the gas creates bubbles in the resin layer at least the portions positioned on the second printing ink layer, and the bubbles foam and bulge the resin layer.
  • the whole of the foamed portions of the resin layer are ground and removed (i.e. hollowed out) to form depressions of which bottoms coincide with the top surface of the second printing layer.
  • a compound which decomposes and generates gas through the application of heat may be used to foam and bulge the resin layer.
  • the paper-laminated metal sheet of the present invention is typically used for construction materials, casing members for furniture and electric appliances, and interior materials for vehicles and ships. It should be noted, however, that the paper-laminated metal sheet is not limited to these applications, but may be used in other applications.
  • the paper-laminated metal sheet of the present invention has a structure in which paper is laminated on at least one side of the metal base material, and a protective layer is formed on the top surface of the paper-laminated side.
  • the paper-laminated metal sheet has a warm touch derived from the paper which is a natural material, and also has high processability and strength derived from the metal base material.
  • the metal base material is in the form of plate (sheet) made of metal, and is not limited to a specific kind.
  • the examples thereof include steel sheets, copper sheets, aluminum sheets, titanium sheets, and various alloy sheets.
  • the metal base material may be subjected to known surface treatments for giving corrosion resistance. The thickness of the metal base material is properly determined in accordance with the intended use of the paper-laminated metal sheet.
  • Metal foil also may be used as the metal base material.
  • the paper used in the present invention is paper produced by intertwining and agglutinating plant fibers or other fibers into the form of sheet.
  • the thickness and the basis weight of the paper is properly determined in accordance with the intended use of the paper-laminated metal sheet.
  • the paper preferably has the basis weight of 15 to 200g/m 2 .
  • paper which is printed with any patterns or is subjected to physical processings such as embossing, crepe processing, corrugating processing, and calendering processing in its production.
  • printed paper such as decorative paper used for decorating wooden construction materials and wooden furniture.
  • various kinds of decorative paper such as woodgrain paper, imitation leather, and papers printed through known printing processes also may be used.
  • the paper preferably has a maximum elongation of 2% or more, in order to give high processability to the paper-laminated metal sheet. If the paper has the maximum elongation of less than 2%, the paper is easily torn during the processing.
  • the paper preferably has the breaking strength larger than the peel strength at 180 degree (which will be described later) between the paper and the metal base material. The breaking strength (kgf/10mm in width) and the maximum elongation (%) are measured in the state where the sample piece is pulled at a speed of 1mm/min at an atmosphere temperature of 23°C and a humidity of 80%.
  • the paper-laminated metal sheet has a structure in which the paper is laminated on at least one side of the metal base material, and on the top surface of the paper-laminated side (one or both sides of the metal base material), a protective layer is formed.
  • the protective layer is formed on the paper directly or via another layer before or after the paper is laminated on the metal base material.
  • “Another layer” is not specifically limited. In order to perfectly protect the paper, the thickness of the protective layer preferably is 5 ⁇ m or more, but is not required to be excessive. In general, the thickness is 10 to 30 ⁇ m.
  • the protective layer preferably has water-repellency.
  • a water-repellent resin film which has a water contact angle of 60 degree or more measured by a liquid drop method at 23°C.
  • the protective layer with water repellency prevents the paper from being torn and contaminated by water-based liquid, and avoids water penetration through the paper to protect the metal base material from corrosion by water.
  • the contact angle was measured by a liquid drop method in which water droplets were formed on the sample piece of the protective layer, and the contact angle of the droplets were measured at an atmosphere temperature of 23 °C , using a CD-DT .
  • the material for forming the protective layer examples include polyolefin resins, silicone resins, fluorine resins, polyurethane resins, epoxy resins, alkyd resins, acrylic resins, polyester resins, and vinyl acetate resins.
  • Resins containing chlorine atoms such as polyvinyl chloride and polyvinylidene chloride are not suitable in the present invention, because these resins generate harmful gas when burned.
  • the "resin” may include water, organic solvent, and other known additives such as curing agents, curing catalysts, viscosity thickners, wet property modifiers, plasticizers, and fillers in accordance with necessity.
  • the method for forming the protective layer is not specifically limited, and the following methods may be employed, for example.
  • the resin for forming the protective layer is applied on the paper directly or via another layer by a method such as roll coating, spray coating, nozzle coating, dip coating, and bar coating.
  • the applied resin is heated and dried to form the protective layer.
  • the resin may be any of aqueous type (i.e. emulsion type), solvent type, and non-solvent type.
  • the film made of the resin is laminated on the paper using an adhesive agent (which will be described later) if necessary, by a method such as dry laminating, wet laminating, and hot melt laminating.
  • an adhesive agent which will be described later
  • the resin in the molten state is directly extruded through a die onto the paper and the like.
  • the paper is laminated on the metal base material via a pressure sensitive adhesive agent or an adhesive agent (hereinafter, simply referred to as an adhesive agent for the sake of convenience).
  • the adhesive agent is directly applied onto the metal base material, or a film made of the adhesive agent is laminated on the metal base material.
  • the method for applying the adhesive agent is not specifically limited, and the same methods as used for forming the protective layer may be employed.
  • the adhesive agent examples include: vinyl acetate resins such as polyvinyl acetate and an ethylene-vinyl acetate copolymer (EVA); acrylic resins such as a poly(meth)acrylate and/or esters thereof or a copolymer of (meth)acrylate and/or esters thereof and other monomers such as styrene and vinyl acetate; polyurethane resins; polyester resins; polyolefin resins; polystyrene resins such as SBS and SIBS; rubbers such as natural rubber and synthetic rubber; and other known adhesive agents.
  • the adhesive agent may be any of emulsion type, solvent type, and non-solvent type.
  • the amount of the adhesive agent is 0.5 to 40g/m 2 as the weight per area after being dried. If the amount is less than 0.5g/m 2 , the adhesion between the paper and the metal base material becomes weak. Contrary to this, if the amount is larger than 40g/m 2 , wrinkles are created on the paper, and the adhesion effect is saturated. More preferable lower limit of the amount of the adhesive agent is 3.0g/m 2 , and more preferable upper limit thereof is 15g/m 2 .
  • the paper is laminated thereon.
  • the adhesive agent includes a solvent
  • the paper is preferably laminated on the adhesive agent layer before the solvent is completely dried.
  • the adhesive agent has a fluidity through the application of heat or is a thermosetting adhesive agent
  • the paper is preferably laminated on the adhesive agent layer before the adhesive agent is solidified and loses its fluidity.
  • the adhesive agent with fluidity penetrates into the paper through its minute openings, and increases the adhesiveness of the paper.
  • the adhesion agent may too deep penetrate into the paper, and exudes to the surface of the paper (i.e. to the surface on the side opposite to the metal base material).
  • the timing of laminating the paper is properly determined taking into consideration the drying and solidifying speed of the adhesive agent.
  • the paper-laminated metal sheet is passed through a hot air drying equipment to completely drying and curing the adhesive agent.
  • the same cares as those described above are preferably taken in the formation of the protective layer.
  • the peel strength at 180 degree between the paper and the metal base material attached to each other via the adhesive agent layer is preferably in the range between 0.01 to 5.0kgf/10mm in width, and the peel strength is smaller than the breaking strength of the paper itself.
  • the paper-laminated metal sheet of the present invention which satisfies these requirements, can be processed without wetting the paper with water while preventing the paper from being torn. It is recommended that the kinds of the adhesive agent and the paper are properly selected so that these requirements are satisfied.
  • the peel strength at 180 degree is smaller than 0.01kgf/10mm in width, the adhesion of the paper to the metal base material becomes weak.
  • the paper may peel off with time.
  • the peel strength at 180 degree of larger than 5.0kgf/10mm is not preferable as well, because the adhesion of the paper to the metal base material becomes too strong. In this case, the paper cannot resist being deformed in the processing, and may be torn.
  • More preferable peel strength at 180 degree is in the range between 0.1 to 0.5kgf/10mm.
  • the peel strength at 180 degree is measured by "the peeling test at 180 degree" in conformance with Japanese Industrial Standards (JIS) Z 0 237 at a peeling speed of 200mm/min at an atmosphere temperature of 23°C and a humidity of 80%.
  • JIS Japanese Industrial Standards
  • the number of paper is not limited to one, but two or more sheets of paper may be used.
  • the adhesive agent is applied on the first paper, and then the second paper is laminated thereon.
  • the second paper i.e. the paper laminated on the first paper and positioned on the opposite side of the metal base material
  • the protective layer is formed on the top paper.
  • the decorative paper may be formed with depressions and/or protrusions on its surface, and the depressions and/or the protrusions have different colors from the surrounding portions to form a visually recognizable design.
  • the depressions and/or the protrusions are preferably arranged to coincide with the pattern to be printed.
  • Thus-formed design has a three-dimensional effect, and gives high aesthetic appearance to the decorative paper.
  • Figure 1(a) is a cross-sectional view showing a paper-laminated metal sheet including a decorative paper formed with depressions and protrusions to create a three-dimensional effect.
  • Figures 1(b) is a cross-sectional view of the paper-laminated metal sheet of Figure 1(a) from which the protective layer is omitted.
  • decorative paper 3 is laminated via an adhesive agent layer 2, and a protective layer 5 is further formed on the decorative paper 3.
  • Depressions 4 formed on the decorative paper 3 are left as depressions 4a after the formation of the protective layer 5 formed on the decorative paper 3.
  • Figure 2 is a cross-sectional view showing a paper-laminated metal sheet according to another example where depressions 4 are completely filled with a protective layer 5.
  • any of these structures are employable; however, preferable is the structure shown in Figure 1(a) where the depressions are left as the depressions 4a, in order to keep high aesthetic appearance derived from the decorative paper. Therefore, it is preferable that the depressions of the decorative paper Is not completely filled with the protective layer. To this end, it is recommended that proper arrangements are made in the formation of the protective layer, for example, the protective layer is made into thin thickness.
  • the recommended method for producing the decorative paper having the depressions and protrusions which correspond to the pattern to be made such as those described above is as follows. First, a printing ink layer is formed on a paper base material which is the decorative paper, and then, a resin layer is formed thereon. After that, the depressions and protrusions are formed in the resin layer.
  • Figure 3 is a diagram showing an example of the woodgrain pattern.
  • the woodgrain pattern has annual rings of wood, and specifically, is observed in a flat wooden board.
  • the actual color of the black-colored portion is dark brown, and the actual color of the white-colored portion is light brown.
  • the terms "the three-dimensional patterns” and “depressions and protrusions corresponding to the printed patterns” mean that the depressions form the black-colored portion of the woodgrain pattern when the cross-section of the decorative paper is viewed (or alternatively, the protrusions may form the black-colored portion, as far as the depressions and the protrusions correspond to the pattern).
  • Figure 4 is a cross-sectional view taken along the line A-A of Figure 3.
  • an ink layer 32, 32 to be a dark-colored portion of the woodgrain pattern is partially formed.
  • a resin layer 33 is formed on the remaining portion of the paper base material 31 where no ink layer is formed.
  • the ink layer 32 has a height lower than the resin layer 33 to create depressions 4.
  • a protective layer 5 is formed in such a manner that the protective layer 5 does not completely filling the depressions 4 to leave depressions 4a.
  • the paper base material originally has a color lighter than the ink layer 32, and forms the light-colored portion of the woodgrain pattern.
  • the combination of the ink layer 32 and the paper base material creates the woodgrain pattern shown in Figure 3 on the decorative paper. It is preferable that the depth of the depressions 4a after the formation of the protective layer 5 is 12 to 14 ⁇ m, because thus-formed decorative paper has a touch close to a natural wood.
  • the methods disclosed in above-mentioned Japanese Unexamined Patent Publications Nos. 48-674, 48-777, and 63-77571 may be employed.
  • the ink layer is formed using the ink containing a compound which reacts with the curing agent contained in the resin layer to generate gas, or alternatively, the ink layer is formed using the ink containing a compound which is decomposed through the application of heat to generate gas.
  • various modifications may be made.
  • a first printing ink layer to be the light-colored portion of the woodgrain pattern is formed, and after that, a second printing ink layer to be the dark-colored portion of the woodgrain pattern is formed (and vice versa).
  • a layer printed into a solid color may be formed on the entire surface of the paper base material.
  • the decorative paper having a three-dimensional pattern is not limited to that shown in Figures 3 and 4, but there are also other types of decorative paper employable as "the decorative paper having the depressions and the protrusions corresponding to the pattern".
  • decorative paper is formed with the depressions and the protrusions, but only either of the depressions or the protrusions are colored.
  • decorative paper itself is provided with a pattern using a colorant and the like, and then, the depressions and protrusions corresponding to the pattern are formed.
  • the paper-laminated metal sheet of the present invention has various applications. Hereinafter, typical applications thereof and the effect obtained through the use thereof will be described.
  • the paper-laminated metal sheet can be used as construction materials for houses and buildings.
  • the paper-laminated metal sheet can be used as inner wall materials, ceiling material, flooring material, interior material, partitioning units, panels, doors, sash, and the like.
  • metallic parts including hinges and locks.
  • the paper-laminated metal sheet is used for decorative laminates such as woody decorative laminates, further advantages are obtained in addition to those described in points (1) to (4), such as high processability and resistance to termite, as well as being recyclable.
  • the paper-laminated metal sheet is used for metallic parts, they can be made into the same designs and feelings as those of the main body to which the metallic parts are mounted.
  • a matching is created between the main body and the metallic parts, causing no mismatching and strangeness therebetween, thereby realizing a design of higher sense.
  • the paper-laminated metal sheet can be used for all the furniture which has been conventionally made of steel, such as desks, chairs, lockers, cabinets, counters, stands, bookshelves, partitions, and beds. In addition, it is also applicable to furniture which has been conventionally made of woods or resins only.
  • the paper-laminated metal sheet is used for furniture, the same advantages as those described in the above points (1) to (6) for use in construction materials can be obtained.
  • the paper-laminated metal sheet is used for metallic parts of furniture, the matching is created between the furniture and the metallic parts with no mismatching and strangeness, thereby realizing a design of higher sense.
  • the paper-laminated metal sheet is usable for casing members of electric appliances such as televisions, refrigerators, washing machines, air conditioner, and lightening equipment.
  • the paper-laminated metal sheet is usable for casing members of electric applicances which have been conventionally made of metal sheet alone, thereby realizing a design of high sense.
  • the paper-laminated metal sheet is used for electric appliances, the same advantages as those described in the points (1) to (6) for use in construction materials can be obtained. In addition, it is also applicable as constituent elements for other electric appliances.
  • the applications of the paper-laminated metal sheet of the present invention is not limited to those described in the above points (A) to (C), but there are also other various applications including, for example, interior materials for vehicles such as cars, trains, and ships, metal parts, and vessels.
  • the metal base materials shown in Tables 1 to 5 were subjected to chromate treatment (Cr:30mg/m 2 ), and then, an acryl-based pressure sensitive adhesive agent was applied thereon by a roll coating method in such a manner that the weight after being dried was 10g/m 2 .
  • the papers i.e. decorative paper, paper, embossed paper, crape paper, corrugated paper, calendered paper, and colored polyvinyl chloride film
  • the resins shown in Tables 1 to 5 were respectively applied on the paper, and were dried to form protective layers.
  • the thickness ( ⁇ m) means the thickness of the protective layer after being dried.
  • the thickness ( ⁇ m) means the thickness of the protective layer after being dried.
  • the characteristics of the paper-laminated metal sheets were evaluated by the following methods. The evaluation results are shown in Tables 1 to 5.
  • All the metal base materials had a thickness of 0.3mm except for the aluminum foil used in Example No. 36.
  • the aluminum foil used in Example No. 36 had a thickness of 15 ⁇ m.
  • the decorative paper had a basis weight of 50g/m 2 and was formed with a three-dimensional woodgrain pattern.
  • the paper had a breaking strength lower than the peel strength between the paper and the metal base material.
  • the peel strength of the paper and the metal base material was smaller than the preferable value defined in the present invention.
  • Comparative Examples 57 to 60 the maximum elongation of the paper did not fall within the preferable range defined in the present invention.
  • a plywood veneer board was used instead of a metal base material.
  • the contact angle with water was obtained by a liquid drop method in which water droplets were made on the protective layer, and the contact angle with the water droplets was measured at an atmosphere temperature of 23 °C using a CD-DT .
  • the peel strength at 180 degree was measured in conformance with Japanese Industrial Standards (JIS) Z 0 237. Specifically, the metal base material and the paper (10mm in width) laminated on the metal base material were pinched with the upper and lower chucks respectively. The resistance force obtained by peeling off at a speed of 200mm/min was measured. The measurement was conducted at an atmosphere temperature of 23°C and humidity of 80%.
  • JIS Japanese Industrial Standards
  • the breaking strength (kgf/10mm in width) and the maximum elongation (%) of the paper itself were the values obtained when the sample piece paper was tensed at a speed of 1mm/min.
  • the measurement was conducted at an atmosphere temperature of 23°C and humidity of 80%.
  • the bending test at 90 degree was conducted at R:1mm.
  • the breaking (i.e. cracking) state and the peeling state of the paper at the bent portion were visually observed, and were evaluated under the following standards.
  • the bending test at 180 degree was conducted.
  • the breaking state and the peeling state of the paper at the bent portion were visually observed, and were evaluated under the same standards as used in the evaluation of the processability-1.
  • the peel strength at 180 degree (kgf/10mm in width) between the paper and the metal base material was measured, and was evaluated under the following standards.
  • the materials other than the metal base material i.e. an adhesive agent, paper, a colored polyvinyl chloride film, and a protective layer
  • the generated gas was trapped in a cold trap tube, and then was put into a tedler bag.
  • the gas was analyzed by a gas chromatography, and was evaluated under the following standard.
  • the protective layer Onto the protective layer, 5% acetic acid aqueous solution and 1% sodium hydroxide aqueous solution were respectively dropped. Then, the protective layer was covered with a watch glass. After 24 hours, the 5% acetic acid aqueous solution and 1% sodium hydroxide aqueous solution were wiped out. The state of the surface of the protective layer was visually observed, and was evaluated under the following standards.
  • the resistance of spread of fire was measured by a self-extinguishing characteristics test in conformance with Japanese Industrial Standards K 6744, and was evaluated under the following standards.
  • the unit of the peel strength at 180 degree and the breaking strength of the paper is kgf/10mm in width.
  • the paper-laminated metal sheet has a structure in which the paper is laminated on at least one side of the metal sheet, and then the protective layer is formed on the paper.
  • This structure is simple, but has advantages that the aesthetic appearance of the paper is imparted to the metal sheet.
  • the protective layer prevents the paper from being damaged during the time when the paper-laminated metal sheet is processed or is used for products.
  • higher aesthetic appearance is attained. For example, when paper printed with a woodgrain pattern is used, the paper-laminated metal sheet is valuable in various applications as a novel material with high quality appearance.
  • the paper-laminated metal sheet is useful in not only applications where metal sheets and painted metal sheets have been conventionally used, but also in applications where only wood materials such as plywood and resin materials have been used. Examples of such applications include: construction materials such as inner wall materials, floor materials, ceiling materials, interior materials, panels, and doors; furniture such as lockers, cabinets, and counters; casing members for electric appliances; and interior materials for vehicles such as cars, train, and ships.
  • the paper-laminated metal sheet is also applicable as a material for vessels and metallic parts.
EP98921765A 1997-07-24 1998-05-21 Verbundwerkstoff aus metallfolie und papier Withdrawn EP0930155A4 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP19862597 1997-07-24
JP19862497 1997-07-24
JP19862597 1997-07-24
JP19862497 1997-07-24
JP6375298 1998-03-13
JP06375198A JP3273756B2 (ja) 1997-07-24 1998-03-13 紙が積層された高意匠性金属基材積層板
JP6375298 1998-03-13
JP6375198 1998-03-13
PCT/JP1998/002252 WO1999004969A1 (fr) 1997-07-24 1998-05-21 Feuille metallique sur laquelle est stratifiee une feuille de papier

Publications (2)

Publication Number Publication Date
EP0930155A1 true EP0930155A1 (de) 1999-07-21
EP0930155A4 EP0930155A4 (de) 2001-08-22

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EP98921765A Withdrawn EP0930155A4 (de) 1997-07-24 1998-05-21 Verbundwerkstoff aus metallfolie und papier

Country Status (7)

Country Link
US (1) US6277468B1 (de)
EP (1) EP0930155A4 (de)
KR (1) KR100330926B1 (de)
CN (1) CN1108922C (de)
AU (1) AU728457B2 (de)
CA (1) CA2267355A1 (de)
WO (1) WO1999004969A1 (de)

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CN103522666A (zh) * 2013-10-29 2014-01-22 垫江县和欣钢质门有限公司 一种钢板表面处理方法
EP2883697A4 (de) * 2013-10-07 2016-05-18 Nakamoto Packs Co Ltd Laminat für papierbehälter und papierbehälter daraus

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US8088480B2 (en) * 2003-09-29 2012-01-03 Shieldmark, Inc. Adhesive tape
CN104893609A (zh) * 2005-04-22 2015-09-09 因赛特解决方案有限责任公司 地面标示胶带
US20070001558A1 (en) * 2005-06-30 2007-01-04 Bush Industries, Inc. Digitally printed furniture and methods for manufacture thereof
CA2625272A1 (en) * 2005-10-12 2007-04-19 Shieldmark, Inc Contrasting tape
US20090022957A1 (en) * 2006-04-06 2009-01-22 Shin-Etsu Polymer Co., Ltd. Decorative sheet and method for producing the same
KR20140071421A (ko) * 2011-09-30 2014-06-11 닛뽄스틸 앤드 스미킨 메탈 프로덕츠 컴퍼니 리미티드 수지 구조체와 금속판을 구비한 복합 구조체 및 그 제조방법
US20140041671A1 (en) * 2012-08-10 2014-02-13 3M Innovative Properties Company Refill filtering face-piece respirator
US9475340B2 (en) * 2013-10-01 2016-10-25 David L. Osment Method and article for constructing a three dimensional decorative object
CN104878903A (zh) * 2015-03-29 2015-09-02 桐城市诚信木塑科技材料有限公司 一种防水防滑地板
CN109321111A (zh) * 2018-09-03 2019-02-12 安庆市航海印务有限公司 一种提高包装盒防水防霉性能的印刷方法
KR102103540B1 (ko) * 2019-06-26 2020-04-23 삼원액트 주식회사 가연성 박막 건축내장 소재가 접착된 금속판재 및 이를 부착하기 위한 부착구조물
CN111169142A (zh) * 2020-01-14 2020-05-19 重庆未名盛材科技有限公司 一种在金属板上贴合墙纸布的方法

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EP2883697A4 (de) * 2013-10-07 2016-05-18 Nakamoto Packs Co Ltd Laminat für papierbehälter und papierbehälter daraus
US9926101B2 (en) 2013-10-07 2018-03-27 Nakamoto Packs Co., Ltd. Laminated material for paper containers and paper containers using it
CN103522666A (zh) * 2013-10-29 2014-01-22 垫江县和欣钢质门有限公司 一种钢板表面处理方法
CN103522666B (zh) * 2013-10-29 2015-10-14 垫江县和欣钢质门有限公司 一种钢板表面处理方法

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CN1234766A (zh) 1999-11-10
KR100330926B1 (ko) 2002-04-03
WO1999004969A1 (fr) 1999-02-04
AU7450098A (en) 1999-02-16
US6277468B1 (en) 2001-08-21
CN1108922C (zh) 2003-05-21
KR20000068604A (ko) 2000-11-25
EP0930155A4 (de) 2001-08-22
AU728457B2 (en) 2001-01-11
CA2267355A1 (en) 1999-02-04

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